Abstract
In the study of the relationship between bacteriophage and strains of staphylococci showing inhibition, slight differences were observed in the ability to adsorb phage between staphylococci of full phage sensitivity and those showing inhibition by phage. Only a few plaques were produced by inhibitory phages adsorbed on strains showing inhibition, whereas almost all of the phages adsorbed on corresponding phage-propagating strains produced plaques. Some strains showing inhibition were converted to full sensitivity to certain phages by heat shock or trypaflavine treatment. Treated strains adsorbed inhibitory phages to almost the same degree as nontreated strains, but most of the phages adsorbed on treated strains produced plaques. Killing was not always observed in cells adsorbing inhibitory phages. These results suggest that inhibition is not due to low adsorption rates, but rather to plaque formation by a small number of the sensitive fraction of the population and overgrowth by nonlysed cells.
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Selected References
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